Electric gas-lighter



(No Model.)

D. J. QUINN &' P; W. HOFFMANN.

Patented May 2, 1893.

uiiiiiilm o-urrya, WASHINGTON n c V UNITED STATES PATENT OFFI E.

MASSACHUSETTS, ASSIGNORS TO THE IONA MANUFACTURING COM PANY, OFPORTLAND, MAINE.

ELECTRIC GAS-LIGHTER.

SPECIFICATION forming part of Letters Patent No. 496,618 dated May 2,1893.

I Application filed June 20, 1892. Serial No. 437,332. (No model.)

To all whom it may concern:

Be it known that we, DAVID J. QUINN, of Brookline, in the county ofNorfolk, and PAUL W. HOFFMANN, of Boston, county of Sulfolk, State ofMassachusetts, have invented certain new and useful Improvements inElectric Gas- Lighters, of which the following is a descrip-- tionsufficiently full, clear, and exact to enable any person skilled in theart or science to which said invention appertains to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification, in which- Figure 1 is an elevation of a gas burnershowing our improved electric lighting device, the parts beingrepresented in the position assumed after the gas has been ignited; Fig.2 a like view showing the parts in the position assumed in lighting thegas; Fig. 3 a similar view showing the valve moved to shut ofi the gassupply; Fig. 4 a side elevation looking from the left in Fig. 1; andFig. 5 a top plan view enlarged, the parts being in the position shownin Fig. 1.

Like letters and numerals of reference indicate corresponding parts inthe different figures of the drawings.

Our invention relates to an electric lighting apparatus for gas-burners,the particular object being to prevent a spark being formed whenshutting off the gas supply.

The nature and operation of the improvement will be readily understoodby all conversant with such matters from the following explanation.

In the drawings A represents a burner of ordinary construction andprovided with a tip, I). A fixed contact point, d, is insulated from thetip and provided with binding posts, f, for one electric conducting wirein the usual manner. The ordinary rotatable valve, 13, is disposed inthe pipe, 0, adjacent the burner and on the stem, g, of said valve thereis a segment, 71, fast. Said segment is provided with two tangent stopfingers or points, k, 10 Equidistant from opposite sides of the stem orpivot, g, there are two laterally projecting pins, m,m A frame orsupporting arm, p, is secured to the burner and is provided with alaterally projecting stop pin, q, disposed between the points, k, 10 inposition to be alternately engaged thereby. On the outer end of theframe, 19, a V- shaped lever, D, is pivoted to swing vertically. Onearm, 4", of said lever forms the spark arm, and is provided with theusual spring contact point, t, at its free end. Said lever is inelectrical contact with the pipe, O. The opposite arm, r of'said leveris provided with the ordinary pull cord or chain, 1). Projectinglaterally from said arm, 0*, there is a lug, w, in the outer or upperend of which an actuating pawl,w,is-pivoted. Said pawl is provided witha flattened .or triangular head,y, above its pivot on which the free endof a fiat tension spring, 2, secured to the arm, 7", bears. The lowerend of the pawl has a notch, 15, in position to take on the pin, m, ofthe segment and adjacent said notch there is a curved notch, 16, inposition to take on the pin, m as hereinafter described.

The lever, D, is held bya spring, 17, secured by an endto the frame arm,19, and passing under a pin or lug, 18, on the lever arm, r.

In the use of our improvement the parts being in the position shown inFig. 1, the gas is ignited. To shut off the supply the pull, 1), isactuated throwing the notch, 15, of the pawl, at, into engagement withthe pin, 0%, on the segment, h, moving the segment sufficiently to closethe cook or until its point, it, comes into engagement with the stoppin, q, as shown in Fig. 3. This stop is so arranged that the sparkcontact, t, does not engage the fixed contact, d. As soon as the pull isreleased the spring, 17, throws the lever, D, back into its normalposition. To light the gas the pull is actuated in like manner, thesegment being in the position shown in Fig. 3. The notch, 16, of thepawl, 00, now engages the pin, m on the segment rotating it in theopposite direction and openingthesupply. At the same time the sparkcontact, 25, meets and passes the fixed contact, d, igniting the gas,the parts being in the position shown in Fig. 2. As soon as the pull isagain released it is thrown backward by its spring and the pawl isadjusted by the spring, z, into position to again engage the pin,m, onthe segment and close the supply when the pull shall be again operated.

By our improved mechanism it becomes practically impossible to groundthe circuit accidentally as in closing the cock the spark contacts donot meet and therefore cannot be left in engagement after the gas isextinguished as frequently happens to lights of this class where thecontacts pass each other both in lighting and extinguishing the gas.

Having thus explained our invention, what we claim is 1. A gas burner,arotatable valve therefor, a spark arm pivoted on said burner,andaco-operating fixed contact therefor in combination with a two armpawl pivoted on said spark arm; a disk on the valve stem provided withprojections in position to be alternately engaged by the pawl-arms and astop for said disk, substantially as described.

2. A gas burner a rotatable valve therefor combined with aspring-tensioned spark arm and a co-operating fixed contact therefor, apawl for opening and closing said valve by the movement of thespark-arm, and stops limiting the movement of the valve in eitherdirection, one of said stops being so arranged that the contacts shallnot engage during the movement for closing said Valve, substam tially asdescribed.

8. A gas-burner, a rotatable valve therefor a spring-tensioned pivotedspark arm and cooperating fixed contact therefor, a segment on saidvalve, stops limiting the movement of said valve in either direction anda springtensioned actuating pawl on said spark arm adapted toalternately engage projections on said segment to open and close thevalve, substantially as described.

4. The gas burner, spring-tensioned pivoted spark-arm and fixed contactin combination with the valve, the segment, h, on the stem thereofprovided with the stops, as k, 70 a pin on the burner in the path ofsaid stops; projections, as, m, m on said segment and a notchedspring-tensioned actuating pawl pivoted to said spark arm and adapted toalternately engage said projections substantially as described.

l/Vitnesses: I

KATHARINE DURFEE, O. M. SHAW.

